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A. C. FORBES. TUBE GUTTER. No. 474,823. Patented May 17, 1892.

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ALEXANDER C. FORBES, OF CORRY, PENNSYLVANIA, ASSIGNOR OF THREE- SEVENTHSTO GEORGE T. IIANNING, OF NEIV YORK, N. Y.

TUBE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 474,823, dated May 17,1892.

Application filed March 23, 1889. Renewed June 6, 1890. Serial No.354,496. (No model.)

To afZZ whom it may con/cern:

Be it known that I, ALEXANDER C. FORBES, a citizen of the United States,residing at Corry, in the county of Erie an d State of Pennsylvania,have invented certain new and useful Improvements in Tube-Cutters; andIdo hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, forming part of this specification.

My invention consists in the improvements in tube-cutters hereinaftersetforth and eX- plained, and illustrated in the accompanying drawings, inwhich- Figure l is a view in elevation of my irnproved tube-cutter. Fig.2 is a central longitudinal section of same. Fig. 3 is a crosssection ofthe body of the tube-cutter on the line c @c in Fig. l, looking in thedirection of the arrow. Fig. et is a perspective view of one of thelevers on which the rotary cutters are mounted, detached from themachine. Fig. 5 is a central longitudinal section of an extensionattachment to my tube-cutter.

Like letters refer to like parts in all of the figures.

In the construction of my invention shown, A is the head of theexpander-body, and B thestem thereof. In the body A a chamber C is boredout. In the shell surrounding the chamber C are cut three slots D D D,equidistant from each other. At the inner ends of the slots D are cutradially-slotted bearings d. In the slots D are placed levers E, theselevers being at their outer ends b about the same or of less thicknessthan the shell of the chamber C, from which point to near the inner endsg thereof they gradually increase in thickness, so that the ends g areof about twice the thickness of the ends h. These levers E have journalse on the inner ends g thereof, adapted to receive the rotary cutters F,and also to project beyond the cutters F into the slots CZ. Near theouter ends of the levers E, I cut annular grooves f, into which anannular ring G, secured to the outer end of the body A, fits when thelevers E are in place in the slots D, so as to prevent any longitudinalmovement of the bars E in the slots D. Through the stern B of the bodyA,

I bore a longitudinal opening II, opening centrally into the inner endof the chamber C in the head A. In a portion of this opening II,

I cut a screw/thread 7i. In the opening' l-I, I insert a rod I, which ispartially screw-threaded,

so as to engage with the screw-thread h in the stem B. To the end of therod I, which eX- 6o tends into the chamber C, I secure a collar .I

of such size as will tit loosely in the chamber C, so that when it is atthe outer end of the chamber C the levers E will close into the slots D,so that the rotary cutters F on the inner ends thereof will be below theoutside surface of the body A; but when the collar J is moved toward theinner end of the chamber C it acts upon the inclined inner surfaces ofthe levers E (the outer ends thereof being 7o i held by the ring G) andserves to force their inner ends and the rotary cutters F, mountedthereon, outward. The collar J is moved inward or outward in the chamberC by rotating the rod I by means of a crank K, (shown in dotted lines,)applied to the squared outer'end of the rod I, the screw-thread on saidrod I engaging with the screw-thread 7i in the stem B and causing therod I to travel in or out, according to the direction in which it is ro-8o tated. On the stem B is an adjustable collar L, adapted to slidelongitudinally thereon and be secu-red at any desired point by means ofa set-screw Z. Upon the collar L is mounted a rotating ring M, securedin place by a collar fm, fastened to the collar L by means of screws nn. Tliis ring M is provided with lips or flanges N N, which extendtoward and over the head A at a sufficient distance radially therefrom,so that when the head A is 9o inserted into the end of a tube theIianges N N will pass over the outside of the end of the tube, so thatwhen a tube projects through a boiler-head the collar L, carrying thering M, can be so adjusted upon the stem B as to cut the tube oft at anypoint desired with relation to the head of the boiler in which the tubeis situated.

In Fig, 5 I show an extension device consisting of a hollow stem O, ofany desired roo length, provided with a grooved socket O at one endadapted to be secured by means of a set-screw c upon the end b of thestein B of the tube-cutter, While the opposite end thereof is providedwith a squared end suitable to receive a crank K2. Through the openingin the hollow stem O is a rod P, provided with a socket P on its innerend adapted to fit the Asquare end p of the rod I in the stem B, the

outer end of the rod P being squared to receive a crank K for turningthe same.

In operation the collar J is moved toward the outer end of thecutter-head A by means of the rod I until it occupies the position shownin Fig. 2. rlhis allowsthe levers E and rotary cutters F, mountedthereon, to move inward until the cutters F are even with or below theperiphery of the cutter-head A. The head A is then inserted into the endof a tube to be cut until the cutters F are opposite the point at whichit is desirous of cutting off the tube. The collar L is then movedforward until the ends o 0 of the iianges N N contact with the outsideof the boiler-head, when the collarL is secured to the stem B by meansof the set-screw Z. The crank K is then turned until the cutters F aremoved out into contact with the inner surface of the tube, when the bodyA and stem B of the cutter is rotated by means of a crank K', the crankK being meanwhile turned suliiciently to force the cutters F outwarduntil the tube is severed. In case the cutter has to be used in alocomotive smoke-box or under like conditions the cranks K and K arethen removed and an extension device, as shown in Fig. 5, (of suitable1ength,) is secured to the outer end of the stem B and cranks K and K2secured to the outer end thereof, when the device is operated, ashereinbefore described.

Having thus fully described my invention,

so as to enable others to construct and use the same, what I claim asnew, and desire to secure by Letters Patent of the United States, 1s-

1. The combination, in a tube-cutter, of a centrally-chambered andradially-slotted cutter-head, wedge-shaped levers mounted in the slotsin said head, so that one end of each of Said levers can be movedradially, and rotary cutters mounted on bearings on the movable ends ofsaid levers, with a longitudinallymoving screw-actuated collar in thecentral chamber of said head between said wedgeshaped levers, adaptedwhen moved longitudinally to force the free ends of said radiallymovinglevers and the rotating cutters thereon outward, substantially as andfor the purpose set forth.

2. The combination, in a tube-cutter, of a longitudinally-slotted headA, havinga longitudinal chamber C therein and a hollow stem B, and thelevers E, secured at their outer ends in the slots D by a ring G andhaving rotary cutters F mounted on bearings E on their inner ends, witha collar J in the chamber C, secured to a screw-threaded rod I, eX-tending through the opening in the stem B and engaging with a screwtherein, whereby the collar J may be moved longitudinally in saidchamber, substantially as and for the purpose set forth.

In testimony whereof I attix my si gnatu re in presence of witnesses.

vALEXANDER C. FORBES.

Witnesses:

GEO. A. NANTES, A. F. ISOLE, M. H. STEWART.

